I had a couple of calls within a few minutes from this person, again it was about sim card cancellation and insistence that a new one was to be sent next day. She wanted to know who pays the bills and told me to look at a texted security warning I should have received from O2. Which I had, of course. The first couple of times this registered as a private number and the third time the number was marked as suspected spam. I might have thought they were different callers except that the sim card issue was mentioned here.
Community overview
3 user reports
About this number
Number formats
- UK format: 020 4621 3520
- International: +44 20 4621 3520
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Reported categories
Based on 3 public user reports
User Reports (3)
Said from O2, needed to send a new SIM and I had to confirm address, when I said O2 obviously have my address got extremely aggressive when I refused to give address when she didn't know my current or even my name...
Says phoning from O2. Threatening to cut off sim card. Trying to get owner to give them the passnumber from O2. Presumably to change the account to their control. Same as past scams received.
Report this number: 020 4621 3520
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4621 3520 and tap the info icon (i)
- Scroll down and tap Block this Caller
- Confirm by tapping Block Contact
On Android
- Open the Phone app and tap the 3-dot menu
- Go to Call history or Recents
- Long press on 020 4621 3520
- Select Block number or Block/report spam
On Landline Phones
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- BT Call Protect - free for BT customers
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- Call blocking devices like CPR Call Blocker (available on Amazon)
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